Optrex 323 1867 (rebranded as KYDE 3232351) display

[symbianas]

Hi, I would like to try to play with Optrex 323 1867 (rebranded as KYDE 3232351) monochrome display (256x26 pixels).

I did not find any documentation about it. The only thing I found is Optrex 323 display:
http://serdisplib.sourceforge.net/ser/optrex323.html

As I understand it contains of 2 displays, each has 34pins and contains 128x26 pixels. For start I would like to control one of them. I have the board from which display was taken. It has single 32pin connector to which all display and button data flow go.

I have analyzed the board and identified which pins go through that connector:

Display pins -> (board connector) Meaning

 2 -> (30) GND
 3 -> (30) GND/Power +5V (One display goes to GND another to Power on this pin)
16 -> (30) GND
17 -> (26) Power +5V (with resistor 100 ohm)
18 -> ( 7) D0?
19 -> ( 8) D1?
20 -> ( 9) D2?
21 -> (10) D3?
22 -> (11) D4?
23 -> (12) D5?
24 -> (13) D6?
25 -> (14) D7?
26 -> (32)  ?  (with resistor 0 ohm)
27 -> (19)  ?  (with resistor 100 ohm and Capacitor to GND)
28 -> ( 5)  ?  (with resistor 100 ohm)
29 -> ( 6)  ?  (with resistor 100 ohm and Capacitor to GND)
30 -> (21)  ?  (with resistor 100 ohm and Capacitor to GND)

How could I identify these pins with "?" ? And how could I connect all these pins to Arduino?

 

[symbianas]

So I did further investigations. This display contains of 2 256x13 pixel displays.


Display pins -> Meaning (where goes on original board)
2 -> GND
3 -> GND/Power (one display goes to GND another to Power on this pin)
16 -> GND
17 -> Power
18 -> D0? (on original board goes to MC74VHC541 Bus Buffer chip pin Y8)
19 -> D1? (on original board goes to MC74VHC541 Bus Buffer chip pin Y7)
20 -> D2? (on original board goes to MC74VHC541 Bus Buffer chip pin Y6)
21 -> D3? (on original board goes to MC74VHC541 Bus Buffer chip pin Y5)
22 -> D4? (on original board goes to MC74VHC541 Bus Buffer chip pin Y4)
23 -> D5? (on original board goes to MC74VHC541 Bus Buffer chip pin Y3)
24 -> D6? (on original board goes to MC74VHC541 Bus Buffer chip pin Y2)
25 -> D7? (on original board goes to MC74VHC541 Bus Buffer chip pin Y1)
26 -> ? (on original board goes to MC74VHC541 Bus Buffer chip pin OE1)
27 -> ? (on original board goes to H8S/2674R microcomputer pin 89 PF4/HWR)
28 -> ? (on original board goes to H8S/2674R microcomputer pin 6 PC0/A0)
29 -> ? (on original board goes to H8S/2674R microcomputer pin 86 PF1/UCAS/IRQ14)
30 -> Power


What does MC74VHC541OE1 pin OE1 do? Also what do H8S/2674R pins PF4/HWR, PC0/A0, PF1/UCAS/IRQ14 do?
Any help on driving this display with arduino?